Zone 2 Guardrail — Support

Need help with Zone 2 Guardrail? You’re in the right place.

Contact: [email protected] — questions, bugs, and feedback all welcome. I read every message.

Getting started

1. Open Zone 2 Guardrail on your Apple Watch.
2. Set your Zone 2 ceiling (see below).
3. Tap Start Guarding and begin your workout.
4. Put your wrist down. You’ll feel a buzz if your heart rate climbs above the cap.
5. Tap Stop when you’re done to see your session summary.

Frequently asked questions

How do I set my Zone 2 ceiling?

Open the settings (the slider button on the home screen). You can set your ceiling three ways:

• From your age — calculated automatically and fully adjustable.
• From your measured max heart rate — enter your own tested maximum.
• A fixed number — set the exact bpm ceiling yourself.

You can also choose what fraction of your maximum defines your zone. Your setting is saved for next time.

Will it alert me if I turn sound off?

Yes. The wrist haptic (vibration) always fires when you go above your ceiling, whether or not sound is enabled. Audible beeps are optional — you turn them on in settings if you want them. You never need to hear anything to stay guarded.

What do the alerts mean?

• Strong buzz — you’ve crossed above your Zone 2 ceiling. Ease off.
• Lighter repeated nudges — you’re still above the cap.